6.2. System Calls

Try these first

1. 1.

   What is a system call?

   Hint

   Think about communication in an operating system.

2. 2.

   Name one system call related to file management.

   Hint

   Consider how programs access files.

3. 3.

   What is the primary purpose of a system call?

   • A) To terminate processes
   • B) To allow user applications to request kernel services
   • C) To manage memory
   • D) To communicate between two user applications

   Hint

   Think about how user applications perform tasks.

4. 4.

   True or False: In kernel mode, user applications have full control over hardware.

   • True
   • False

   Hint

   Remember the distinction between user and kernel modes.

5. 5.

   Develop an application using system calls that opens a file, reads its content, and handles possible errors. Explain the system calls used.

   Hint

   Focus on the order of operations and error management.

6. 6.

   Discuss the security implications of system calls and how they prevent unauthorized access to system resources in an operating system.

   Hint

   Consider user access levels and system criticality.